Strong magneto-volume effects and hysteresis reduction in the In-doped (NiCo).sub.2./sub.MnGa Heusler alloys

0464084 - FZÚ 2017 RIV NL eng J - Journal Article
Kamarád, Jiří - Fabbrici, S. - Kaštil, Jiří - Míšek, Martin - Cabassi, R. - Cugini, F. - Albertini, F. - Arnold, Zdeněk
Strong magneto-volume effects and hysteresis reduction in the In-doped (NiCo)₂MnGa Heusler alloys.
Journal of Alloys and Compounds. Roč. 685, Nov (2016), s. 142-146. ISSN 0925-8388. E-ISSN 1873-4669
R&D Projects: GA ČR GA15-03777S
Institutional support: RVO:68378271
Keywords : Heusler alloys * martensitic transformation * magnetic properties * high pressure
Subject RIV: BM - Solid Matter Physics ; Magnetism
Impact factor: 3.133, year: 2016

We report the effect of high hydrostatic pressure (up to 1.1 GPa) on magnetization and critical temperatures of the magnetic and magneto-structural transitions in the off-stoichiometric In-doped (Ni, Co)(2)Mn(Ga, In) alloys. The magnetization M-M(5 K) of their martensitic phase significantly decreases under pressure and the value of dlnMM(5 K)/dP = -55 x 10(-3) GPa(-1) was observed in the Ni41Co9Mn33Ga14In3 alloy. The temperature of structural transition of the alloys from martensite to austenite, TM-A, shows a strong dependence on both pressure (dT(M-A)/dP = 60 K/GPa) and magnetic field. The complex mutual dependence of TM-A to both pressure and magnetic field produces a remarkable reduction of the transformation hysteresis.
Permanent Link: http://hdl.handle.net/11104/0263137